You all will find when you hit the mountains your cardio is pretty good but unless you did some hip flexor and abductor training your legs will get shot pretty early.
Lots of going over downed timber that taxes your various hip muscles way different than normal gym exercises. You'll be swinging your legs over logs sideways and every which way except straight over..
Do some hip adductor and abductor exercises on a cable machine and some various lunges with weights.
Stairs are also good for cardio and building quads and glutes, hit a taller building near you and take the stairs.
